7.6
This is by far one of the most challenging games you'll play. The graphics are crisp and clear, allowing you to really look and understand what is going on. You are given enough materials so that there are a few ways to solve each puzzle, which adds some interest to the game. Some levels do seem nearly impossible that you might have to look up cheats. There aren't all that many hints, so you have to figure it out on your own. The tutorial is also lacking in a few places.
